//
//  MainTabBar.swift
//  SinaWeibo
//
//  Created by 周小伟 on 16/8/22.
//  Copyright © 2016年 周小伟. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {
    override init(frame:CGRect){
        super.init(frame: frame)
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
        setupUI()
    }
    
    private func setupUI(){
        addSubview(composeBtn)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        let w = self.bounds.width/5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index:CGFloat = 0
        for subView in subviews{
            if subView.isKindOfClass(NSClassFromString("UITabBarButton")!){
                subView.frame = CGRectOffset(rect, index * w, 0)
                index += index == 1 ? 2 : 1
            }
        }
        
        composeBtn.frame = CGRectOffset(rect, w * 2, 0)
        bringSubviewToFront(composeBtn)
    }
    
    lazy var composeBtn:UIButton = {
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named:"tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named:"tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        btn.setImage(UIImage(named:"tabbar_compose_icon_add"), forState: .Normal)
        
        btn.setImage(UIImage(named:"tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
        btn.sizeToFit()
        return btn
    }()
}
